Composition of matter for use in removing grease, &amp;c., from the molds used in the art of electrotyping.



UNITED STATES PATENT OFFICE.

GEORGE E. DUNTON, OF NEW YORK, N. Y.

COMPOSITION OF MATTER FOR USE IN REMOVING GREASE, &c., FROM THE MOLDSUSED IN THE ART OF ELEGTROTYPING.

No Drawing.

To all whom it may concern:

Be it known that I, GEORGE E. DUNTON, residing at New York, county ofNew York, State of New York, a citizen of the United States, haveinvented certain new and useful Improvements in Compositions of Matterfor Use in Removing Grease, &c., from the Molds Used in the Art ofElectrotyping; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use the same.

The material for forming molds used in the electrotyping art for theproduction of printing plates is commonly made of some substance such asbeeswax, ozocerite wax or like material which contain an appreciablepercentage of grease, oil or oily substance in their composition. Whenpressure is applied to a form or cut in making the 1111- pression in themold, it causes the grease or oily substance to be forced out and appearon the face of the mold in the form of a thin coating or film, saidcoating or film is very troublesome and annoying to the electrotyper asit causes imperfect and faulty reproductions, especially in case Wherethe so-called half tone illustrations are being made which are composedor made up of a collection of very fine dots.

My invention relates to a new and useful composition for curing theabove fault which is especially adapted for use in dissolving,disintegrating and removing grease, oil, or other fatty substances fromthe pressed surfaces of wax molds used in the art of electrotypingpreparatory to applying a black lead or other coating to the mold.

The composition consists of the following ingredients in about theproportions stated :--methyl alcohol 8000 cubic centimeters, caustgcspda grams, chlorin gas 2 thousand cubic centimeters, water 1000 cubiccentimeters.

In compounding the composition, I first provide a suitable receptacleand pour into the same 8000 cubic centimeters of methyl alcohol, to thisalcohol add 2 thousand cubic Specification of Letters Patent.

Patented Oct. 8, 1912.

Application filed September 6, 1910. Serial No. 580,539.

centimeters of chlorin gas, which has been previously dissolved in 1000cubic centimeters of water to saturation, while stirring the solutionbriskly, and finally add 55 grams of caustic soda and continue thestirring until the same is dissolved and the solution takes on a reddishtinge. I rely upon the action that occurs between the mixture, or as aresult of the mixture, of chlorin, alcohol and caustic soda to producethe results hereafter described and set forth.

This composition is to be placed in a lead lined trough orreceptacle ofsufficient size to take the largest size mold, when it is ready for use,but it should be stirred occasionally to keep the chlorin and otherelements mixed. The composition may be poured over the surface of thewax mold or the mold may be immersed or dipped into the composition asis desired.

The above composition acts to break up and dissolve the constituentparts of the grease, oil or other substance appearing on the surface ofthe mold and destroys the cohesion between the several elementscomposing the grease, oil or other substance so as to permitof its easyremoval from the surface of the mold.

I do not wish to confine myself to the exact proportion of eachingredient as stated, as they may be varied, and other combinations maybe made to produce the same results and still come within the scope andspirit of my invention.

What I claim is:

1. A composition for use in removing grease, oil or fatty substancesfrom molds, used in the art of electrotyping, the constituentingredients of which are alcohol, caustic alkali and chlorin gasdissolved in water, substantially as described.

2. A composition for use in removing grease, oil or fatty substancesfrom molds, used in the art of electrotyping, the constituentingredients of which are methyl alcohol, caustic alkali and free chloringas dissolved in water, substantially as described.

3. A composition for use in removing grease, oil or fatty substancesfrom molds,

used in the art of electrotyping, the con- In testimony whereof, I aifixmy signature stituent ingredients of which are methyl alin the presenceof two witnesses. cohol eight hundred cubic centimeters,

chlorin gas two thousand cubic centimeters, GEORGE DUNTON water onethousand cubic centimeters and Witnesses:

caustic soda fifty five grams, substantially H. BECKER,

as described.

FRANCIS S. DUFF.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatenti, Washington. I). O.

